obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 60 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c
new file mode 100644
index 000000000..f42a2c0ca
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c
@@ -0,0 +1,60 @@
+/* Test that __builtin_prefetch does no harm.
+
+   Use addresses that are unlikely to be word-aligned.  Some targets
+   have alignment requirements for prefetch addresses, so make sure the
+   compiler takes care of that.  This fails if it aborts, anything else
+   is OK.  */
+
+struct S {
+  short a;
+  short b;
+  char c[8];
+} s;
+
+char arr[100];
+char *ptr = arr;
+int idx = 3;
+
+void
+arg_ptr (char *p)
+{
+  __builtin_prefetch (p, 0, 0);
+}
+
+void
+arg_idx (char *p, int i)
+{
+  __builtin_prefetch (&p[i], 0, 0);
+}
+
+void
+glob_ptr (void)
+{
+  __builtin_prefetch (ptr, 0, 0);
+}
+
+void
+glob_idx (void)
+{
+  __builtin_prefetch (&ptr[idx], 0, 0);
+}
+
+int
+main ()
+{
+  __builtin_prefetch (&s.b, 0, 0);
+  __builtin_prefetch (&s.c[1], 0, 0);
+
+  arg_ptr (&s.c[1]);
+  arg_ptr (ptr+3);
+  arg_idx (ptr, 3);
+  arg_idx (ptr+1, 2);
+  idx = 3;
+  glob_ptr ();
+  glob_idx ();
+  ptr++;
+  idx = 2;
+  glob_ptr ();
+  glob_idx ();
+  exit (0);
+}